.env.local

loadEnv overrides content from .env(.mode)?.local ... - GitHub

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The primary purpose of .env.local is to override default configuration settings during local development without affecting production environments or other team members' setups. Syntax Example The syntax inside a .env.local file is straightforward:

Below is an example of what a .env.local file might look like. This example assumes you're working on a project that uses environment variables for API keys, database connections, or feature flags: .env.local

Vite follows a similar convention: .env files are loaded using dotenv, with .env.local (and .env.*.local ) being git-ignored. Variables are exposed to the client with the VITE_ prefix.

# Accessible via import.meta.env.VITE_API_URL VITE_API_URL="https://api.local" Use code with caution. 3. Node.js (Vanilla)

If you intentionally want to expose a variable to the browser, you must use your framework's designated public prefix: loadEnv overrides content from

DATABASE_PASSWORD=SuperSecretLocalDevPassword API_BASE_URL=http://localhost:4000 NEXT_PUBLIC_APP_NAME=MyApp-LocalDebug

Environment-specific local overrides.

Never commit .env.local , but always commit an .env.example file. This acts as documentation for your team. Syntax Example The syntax inside a

If you need to manage different settings for automated testing, we can explore how to set up a .

require('dotenv').config( path: '.env' ); require('dotenv').config( path: '.env.local', override: true );

Here's a comprehensive example of what a typical .env.local might look like for a modern Next.js application:

By utilizing .env.local properly, you separate configuration from code execution seamlessly. This keeps your local development environment highly flexible for individual workflows while ensuring that production credentials and personal access keys stay completely secure.

– Environment-specific defaults. Loaded based on the running mode ( npm run dev vs npm start ). Usually committed to version control.